Ride of the Valkyrie

Valkyries are virgin warriors of the Norse god, Odin, and they protect the humans from demons of the outskirts. Yet the demons have found the Valkyries' weakness after the betrayal of the goddess, Freya, to become a sex slave. Thus one Valkyrie was made a sex slave after being threatened that her kinsmen will share the same fate if she did not submit. With the castle taken over, the demons challenged all of the men to impregnate her, if they wish to live...

This is an alternate retelling of Ride of the Valkyrie. Goddess of war —valkyries— are both fierce and invincible in battle. But they have the defect of being attracted to normal male humans, which the inhabitants of the overworld noticed and decided to use in their advantage: not only to win battles, but to capture some valkyries and turn them into sex slaves. Freya was captured and the devils can now see exactly where each goddess is, leading to disaster.

Sequel to Ride of the Valkyries (2004) After being captured by the demon king's army, Valkyrie Reia is about to be executed by Duke, leader of the Dark Knights. However, Ariya, wielding Odin's Gungnir, appears on the scene. With unmatched strength, she easily lays low the demons on the scene. However, when she reaches the condemned, Reia unexpectedly steals Ariya's silver ring, the source of a Valkyrie's power. Without her powers, Ariya is easily captured and also becomes Duke's prisoner...

This is the sequel to Ride of the Valkyries 2 (2008). Imprisoned deep within Duke's castle are three of the revered goddesses known as Valkyries. Their names are Reia, Ariya, and Hildegard. After being captured by the demon king's army, they have been assaulted unceasingly. Their wills and sanity broken, they are now slaves to physical pleasure.